As you must be aware, once CLAT form is submitted it can’t be edited.

If you don’t want to take any chances, the only option left with you is to fill the form once again. However, it appears absolutely gross if your application would be rejected on this trivial error. But official procedures often do not entertain the call of the conscience. Therefore, to be sure I did call multiple times the CLAT Board number – 09446899010. Unfortunately, on all occasion, the number was busy.

I would strongly recommend you to please try this number a couple of time between 10:00 am to 05:00 on any working day and try to get a concrete answer from them on your case. I would also try this number a couple of times tomorrow and update you if I come to know something. 

All the very best.